Area Code 510 Phone Number Lookup

Who called from a 510 number? Look up any California phone number for free.

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Who Is Calling From Area Code 510?

The East Bay's established area code, 510 covers Oakland, Berkeley, and Fremont - a region shaped by education, manufacturing, and maritime trade. UC Berkeley staff, Tesla factory HR recruiters, Kaiser Permanente support lines, and Port of Oakland logistics dispatchers are frequent callers.

510 Phone Numbers Recently Reported as Spam

510 area code numbers reported as unwanted calls to the FTC in the last 30 days.

Phone Number Complaints Last Reported
(510) 746-6730
5
(510) 296-1817
2
(510) 389-5984
2
(510) 210-8112
2
(510) 926-4648
2
(510) 362-7973
2
(510) 319-8806
2
(510) 358-8684
2
(510) 224-9576
2
(510) 240-1325
2

Common Area Code 510 Phone Scams

The 510 area code is being used for Social Security arrest threats and fake purchase refund schemes. Fraudsters try to scare you with jail time or trick you into fixing a fake charge on your account.

Social Security Administration / IRS Aliases: Federal Agent, Officer
Automated calls threaten SSN suspension and grand jury appearances for fraudulent activities unless you call back immediately.
Amazon / Apple / PayPal / Best Buy Aliases: Support Rep, Geek Squad, DELL
Alerts victims to fake $1499 MacBook or iPhone purchases, urging them to press 1 to dispute and surrender financial data.
Legal Process / Courts Aliases: Alameda County Mediation Services, Investigative Recovery Services
Threatens to file formal complaints and necessary paperwork in your county unless you verify your SSN.
Kaiser Permanente / Medicare Aliases: "Juan", Humana Shipping, Kaiser Permanente
Spoofs medical providers to falsely claim your benefits are stopped and demands your SSN to "fix" the issue.
Vehicle Manufacturers Aliases: Auto Warranty Department
Leaves automated "final attempt" messages regarding expired warranties to sell expensive service plans.
Law Firms / Attorneys Aliases: "Kenyon Hall"
Uses robotic monotone voices to gather intelligence on law firms and attorneys, calling back aggressively when denied.

User Reports

Social Security Administration / IRS

"Department of Social Security Administration. The reason you have received this phone call from our department is to inform you that there's a legal enforcement actions filed on your social security number for fraudulent activities. So when you get this message kindly call back at the earliest possible on our number before we begin with the legal proceedings..."

Amazon / Apple / PayPal / Best Buy

"call from this number was to authorize payment to an Amazon Acct for the purchase of a $1499 MacBook Pro laptop. Said to press 1 if I don't authorize, to speak with a support rep."

Legal Process / Courts

"We are contacting you in regards to a formal complaint that's in process of being filed form several different matters we are calling to verify that we do have the correct address for this individual the next step will be filing necessary paperwork within your county if you would like to speak with an agent press one..."

Kaiser Permanente / Medicare

"Robocall fraud, said they were KAISER PERMANENTE and asked it I was myself!!! I have heard that a recording of your voice saying 'YES' can be used for fraud, so I said nothing and hung up."

Vehicle Manufacturers

"Got a call about my 21 year old car's extended warranty. Definitely a scam"

Law Firms / Attorneys

"Kenyon Hall called our office and wanted to speak to my boss regarding life insurance. I put him on hold and came back to let him know my boss was not available... He then proceeded to question me on whether my boss was in the office or not... My boss told me to hang up and I did. He called back I let his call go to voicemail and he then got my bosses mobile from our office message and he called my boss and was rude to him."

Where is area code 510 located?

Area code 510 covers the western portion of the East Bay region of California. It includes cities in Alameda and Contra Costa counties. Specifically, it covers almost everything west of the Berkeley Hills.

Counties Served:

  • Alameda County
  • Contra Costa County

Major Cities:

  • Oakland
  • Berkeley
  • Fremont
  • Hayward
  • San Leandro
  • Alameda
  • Richmond

Other Cities and Towns:

  • Albany
  • Ashland
  • Bayview
  • Canyon
  • Castro Valley
  • Cherryland
  • Crockett
  • East Richmond Heights
  • El Cerrito
  • El Sobrante
  • Emeryville
  • Fairview
  • Hercules
  • Kensington
  • Montalvin Manor

Overlay System

Area code 510 is part of an overlay complex with area code 341 . Area code 510 was established on September 2, 1991. Area code 341 was introduced on July 22, 2019. Ten-digit dialing is mandatory in this region.

FAQs About 510 Phone Numbers

Is area code 510 a scam?

No, 510 is a valid California area code for the East Bay, including Oakland, Fremont, Hayward, Berkeley, and Richmond. Its location in one of the country's most densely populated metro areas makes it a high-value prefix for call spoofing operations.

Why do I get spam calls from area code 510?

The East Bay's large and economically diverse population draws a wide range of fraud types to the 510 prefix. Scammers impersonate Alameda County Mediation Services with fake complaint notices, and a distinct pattern targets law offices specifically: a caller named "Kenyon Hall" reaches out about life insurance in a robotic monotone, turns hostile when denied access, and then tracks down attorneys' personal mobile numbers from office voicemails to continue harassment directly.